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1 How long does unopened sour cream last after the sell-by date? 2  Sour cream will generally keep for one to two weeks after the sell-by date on the package, assuming it has been continuously refrigerated; be sure that the temperature of your refrigerator remains at or below 40Â° Fahrenheit at all times.
So, how long does sour cream last? When properly stored, containers of sour cream last for the time periods indicated in the table below beyond their printed date: Of course, all food and drink products last for a shorter period of time if they are not stored properly.